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A fracture mechanics assessment of surface cracks existing in protective layers of multi-layer composite pipes
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SYSNO ASEP 0353692 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title A fracture mechanics assessment of surface cracks existing in protective layers of multi-layer composite pipes Author(s) Hutař, Pavel (UFM-A) RID, ORCID
Náhlík, Luboš (UFM-A) RID, ORCID
Šestáková, Lucie (UFM-A)
Ševčík, Martin (UFM-A) RID
Knésl, Zdeněk (UFM-A)
Nezbedová, E. (CZ)Number of authors 6 Source Title Composite Structures. - : Elsevier - ISSN 0263-8223
Roč. 92, č. 5 (2010), s. 1120-1125Number of pages 6 s. Language eng - English Country GB - United Kingdom Keywords Protective layers ; Multi-layer pipes damage ; Fracture mechanics ; Bi-material interface ; Generalized stress intensity factor Subject RIV JL - Materials Fatigue, Friction Mechanics R&D Projects GA106/09/0279 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z20410507 - UFM-A (2005-2011) UT WOS 000274870200011 DOI 10.1016/j.compstruct.2009.10.004 Annotation The influence of a cracked protective layer on the integrity of composite multi-layer pipes is analyzed in this paper. The multi-layer pipe is modeled as a particular case of a bi-material body consisting of two different homogeneous materials. The problem is studied under assumptions corresponding to small scale yielding conditions and ideal adhesion between protective and main layers is assumed. The case of a crack with its tip at the interface between protective and main layers is analyzed in detail and the influence of the material composition on the corresponding critical pressure for a brittle-like failure is discussed. An approximate approach based on estimation of crack mouth opening displacement for thin protective layers is suggested. The results have been applied to study the scratch resistance of multi-layered plastic pipes. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2011
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